Steam-boiler



(No Model.)

W. DOUGHERTY & JLP. FEELEY.. STEAM BOILER.

No. 337,138. I Patented Mar. 2, 1886.

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UNITED STATES ATENT Prion.

WILLIAM DOUGHERTY AND JAMES P. FEELEY, OF CHESTER, PENNSYLVANIA.

STEAM-BOILER;

SPECIFICATION forming part of Letters Patent No. 337,138, dated March 2, 1886.

Application tiled December 14, 1885. Serial No. 185,009. (No model.)

To all whom it may concern Be it known that we,WILLIAM DOUGHERTY and JAMES P. FEELEY,'citizens of the United States, residing at Chester, in the county of Delaware and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Boilers; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification,

This invention relates to steam-boilers of the class provided with vertical fire-flues; and it consists in the detailed construction and combination of the parts, as hereinafter fully described and claimed.

In the drawings, Figure 1 is a vertical section through a vertical steam-boiler constructed according to our invention. Fig. 2 is a transverse section of the same, taken on the line :20 x in Fig. 1.

A is the outer cylinder-shell of the boiler, provided with the angle-iron a at the bottom, for attaching it to the base.

B is the top plate of the boiler. provided with the flange b,for securing it to the shell A,and with the flange b, for securing it to the smokestack.

O is the bottom plate of the boiler,provided with the flange c,for securing it to the shell A, and with the flanges 0', for securing it to the fire-box shell.

D is the fire-box shell, cylindrical in form, and preferably made slightly tapering from the bottom upward.

d is the crown-plate of the fire-box, pr0- vided with the flange d, for securing it to the fire-box shell D.

d is the door-opening for the admission of fuel.

A smoke-box is formed in the upper part of the boiler,consisting of the cylindrical shell E, the sides of which are parallel, the bottom plate,e, provided with the flange e',forsecuring it to the said shell E, and the top plate,e. The top plate, 0, is provided with the flange e ,for attachingit to the shell E of the smokebox, and with the flange e, for attaching it to the smoke-stack F. The smoke-stack F is cylindrical in form. It passes through the top plate, B, of the boiler, and is provided with a damper, G, of approved construction commonly in use for that purpose.

H are cylindrical flues occupying the centerof the boiler and extending from the crownplate of the fire-box to the bottom plate ofthe smoke-box. Outside of this group of flues there is a circular line of dues, I, which extend from the bottom plate of the smoke-box down to the bottom plate of the boiler. Outside of these there is a third set of fines, J, which extend from the bottom plate of the boiler to the top plate of the boiler.

All the fines are arranged parallel with one another in perpendicular lines and are properly attached to the respective plates in the ordinary way.

The base K of the boiler is made separate from the boiler itself, and is provided with an annular chamber, 7c,which connects the lower ends of the flues I and J.

L is the fire-grate of the boiler. The course of the products of combustion is as follows: They first have a straight passage upward from the fire-box through the central flues, H, into the smoke or combustion-chamber. When the damper G is open, as during the starting up of the furnace, they pass directly up through the smoke-stack F, affording a strong draft. \Vhen the damper G is closed, the products of combustion pass from the combustion-chamber downward through the dues I, asindicated by the arrows, then through the chamber k, and reascend through the flucs J to the top of the boiler.

The opening of the damper G can be regulated so as to cause more or less of the products of combustion to pass through the flues I and J, according to the condition of the fire. The top plate of the smoke-box should always be kept covered with water, as shown in the drawings.

We are aware that a boiler is described in the patent issued to Gowhig, No. 2l2,30l,dated February 18, 1879, which has fire-tubes arranged to operate in a similar manner to the present invention; but in this boiler the smokebox is formed conical, and is extended to the top of the boiler without any internal smokestack. This form of smoke-box is expensive to construct and reduces the steam-room and water-surface from which the steam has to escape to a very serious extent. Some of the fines being placed at an angle, and the connecting-chamber in the base being formed as a part of the b0iler,instead of being formed in a separate casting and bolted to it, also add greatly to the cost of construction, and make it necessary to clean out the flues from the top.

Boilers constructed according to our invention are easily and cheaply made, all of the fines are surrounded by water, and they are very economical in action, because of the amount of efi'ective heating-surface,which can be increased or diminished, as desired.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is

1. In avertical steam-boiler, the combination of the boiler-shell A, the top plate, B, having flanges b and b, the bottom plate, 0, having flanges c and c, the fire-box shell D, the crown-plate d, having flange d, asmokebox formed with parallel sides and situated in the upper part of the boiler, the smoke-stack F, provided with damper G and connecting the said smoke-box with the top of the boiler, the series of perpendicular fines H, I, and J, arranged parallel with one another, and the base K, provided with the chamber k, substantially as and for the purpose set forth. 2. In a vertical steam-boiler, the combination of the boiler-shell A, the top plate, B, having flanges b and b, the bottom plate, 0, having flanges c and c, the fire-box shell D, the crown-plate d, having flange d, the cylindrical smoke-box shell E, the bottom plate,e, havingflange e, the top plate,e, having flanges e and e, the smoke-stack F, the damper G, the perpendicular flues H, I, and J, arranged parallel with one another, and the base K, provided with the chamber is, substantially as and for the purpose set forth.

In testimony whereof we aifix our signatures in presence of two witnesses.

WILLIAM DOUGHERTY. JAMES P. FEELEY.

Witnesses:

J. M. ALLEN, H. A. LOUGHEAD. 

